Window-screen.



G. J. KNAACK & C. J. MARQUARDT.

WINDOW SCREEN.

APPLICATION man MAR. 28.1916.

1 ,21 3,21 3. Patented J an. 23, 1917.

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UNITED srarns PATENT orr on.

GUSTAV J. KNAACK AND CHARLES a. manousnnr, or rnrnc sron, WIsCONSf- N.

WIND OW-SCREEN.

Application ai aivr r h 2s, 191

To all whom it may concern.

Be it known that we, GUs'rAv J. K AACK and CH.'-\RLES J .NMARQIUAIRDT,citizens of the United States, residing at Princeton, in the county ofGreen Lake, State of .lVisconsin, have invented certain new' and usefulImprovements in Tindow-Screens; and I do hereby declare .the' followingto be a full, clear, and exact description of thevinvention, such aswill enable others skilled in the art to which it appertains to makeanduse the same. i i

This invention relates to window screens, and particularly to that typecommonly called extension screens, which are adapted for insertion inwindow frames of various widths.

The primary object of the invention is to provide a screen of this typewhich may be readily extended or contracted, and wherein flies and otherinsects will be prevented from entering the room through the overlappingportions of the screen fabric.

Y A'further object of the invention is to provide a screen of thischaracter which is of simple and inexpensive construction, which iscomposed of but few readily assemall so arranged as to prevent breakageor derangement of the screen, and which will prove durable andthoroughly eiiicient in practice.

With these objects in view, together With others which will appear asthe description proceeds, the invention resides in the novel combinationand arrangement of parts, all as will be described morefnlly'hereinafter, illustrated in the drawings and particularly pointedout in the claims.

reference to the accompanying drawings, wherein:

Figure 1, is a front elevation of a screen embodying our invention, Fig.2, is a sectional view taken on line 22 of Fig. 1, Fig. 3, is alongitudinal sectional view taken on line 33 of Fig. 1, Fig. 4, is adetail perspective view of one of the connecting bars for the screenframe, and Fig. 5, is a similar view of the connecting strip.

Referring now more particularly to the drawings, 6 indicates the endmembers or stiles of the screen frames, to the extremities of which areconnected the side members 7 the latter extending inwardly from the endstiles in parallel relation. Two of the members or frames thus providedare employed Specification of Letters Patent.

securely held therein.

Patented an. 1917. Serial No. 87,297. v i

in the construction of each screen, the side members of each frameoverlapping each other and are slidab ly connected. Each of the sidemembers 7 of one {image is provided with' a longitudinally extendinggroove, within which a bead or ribeS securedto the adjacent side memberof the other frame fits, whereby the said frames may freely slidewith'relation to eachother and will be prevented from lateral movement..The inner edges of each of the side and end members is grooved as shownfor the reception of the edges ofthe screen fabric9, the latter beingsecured within each of theframes by means of nails or tacks. 1

The free extremities of the respective frames are connectedby a strip10. This strip is formed of a sheet of relativelynarrow metal bentorfolded upon itself as shown, the folded metal being then bent adjacentits lateral edges into substantially ,U-shape. The ends of the strip areinserted in the grooves in the opposite side members, and the screenfabric edge is inserted between the surfaces of the bent metal to be Theen s o a h strip may be secured to the side members by tacks or nails11. The bent portion of each strip extends inwardly slightly beyond theinner faces of the side members to engage and rest upon the wire fabricof-the adjacent screen frame, and by reason of the rounded edges presentipon the bent portions of the strip it will be obvious that slidingmovement of the screen fabric from the said strips will bep'ermitte'dwithout danger of understood that the coextensive with the length of thelatter, and engages with the adjacent face of the screen fabric of theopposite frame throughout the width of the latter.

To securely hold the screen fabric of each frame against bulging, and toprevent insects from gaining access to the room between the overlappingsections of the screen fabric, a connecting bar 12 is provided for eachscreen frame. This bar comprises an elongated metallic member bent uponitself longitudinally as shown to provide rounded corners, the said barbeing of a length equal to the distance between the inner edges of theopposite side members 7 of the frames.

connector plate 13 is secured to the 019130: site ends of eachconnecting bar, and extends the fabric becoming broken or torn by the 1said strip. It will be The invention willbe best understood by over theouter faces of each of the side members 7. The connector plates may bebent as at 14 inwardly so that the bar will rest snugly against thefabric of the adjacent sliding section. Each of the connecting bars 12is arranged directly over the strip 10 with which it travels, the saidbars and strips being spaced apart a distance sufficient to permit ofthe free sliding movement of the screen fabric of the opposite frame andit will be seen that the screen fabric of the slidable frames is thusheld against bulging to prevent insects passing beyond the screen endand into the room. A clip member 15 is secured to each of the sidemembers 7 of the frames, the said clips extending through elongatedslots 16 in the overlapping sides of the adjacent screen section and areconnected at their ends to the connector plates 18, the extremities ofthe said clip members being bent outwardly as shown to secure the saidconnector plates thereto. It is thus seen that the strips 10 and bars 12of each section are held firmly in proper position, and the screenframes are free to slide one upon the other.

While we have herein shown and described a particular or preferedembodiment of.the invention, we desire to have it understood that weneed not confine ourselves to all the precise details of constructionherein set forth by way of illustration, as

modification and variation may be made without departing from the spiritof the invention or exceeding the scope of the claims.

What is claimed is:

1. A window screen comprising two similar frames composed of paralleloverlapping side portions each connected at one end by an end member,screen fabric stretched across each of said frames, a strip connectingthe free ends of each frame and the adjacent lateral end of said fabric,the said strip of each frame being bent inwardly throughout its lengthto engage the adjacent surface of the fabric of the opposite frame,

Copies of this patent may be obtained for and a c0nnecting barconnecting said side members of each frame upon the opposite surface ofthe fabric of the opposite frame to force the said fabric intoengagement with its corresponding strip, substantially as described.

2. A window screen comprising two similar frames composed of slidingparallel overlapping side sections each connected at one end by an endmember, each side portion being provided with registering elongatedslots, screen fabric connecting the ends of each frame and supportingthe adjacent edge of the screen fabric, a bar connecting the ends ofeach of said frames and engaging the fabric of the adjacent frame, clipssecuring the ends of each bar to its respective frame and passingthrough the slot in the next adjacent frame side member, substantiallyas described.

3. A window screen comprising two similar frames composed of paralleloverlapping side portions each connected at one endv by an end member,the said side portions and end members being provided with grooves, wirefabric stretched across each frame and engaged at its edges in saidgrooves, a strip connecting the free ends of each frame, each stripcomprising an elongated metallic member arranged at its ends in saidgrooves and bent longitudinally to provide clamping portions for thereception of the end of said screen fabric, the said strip extendinglaterally to engage with the fabric of the adjacent frame throughout thewidth of the latter, and a bar connecting the ends of each frame andengaged throughout its length upon the opposite side of the adjacentframe fabric and over said strip, substantially as described.

In testimony whereof, we affix our signatures, in the presence of twowitnesses.

GUSTAV J. KNAACK. CHARLES J. MARQUARDT. Witnesses:

H. E. Mneow, EDWARD Bomvrox.

Washington, D. G.

